Furnace



Filed Dec. 16, 1925 2 Sheets-Sheet Fig" INVENTOR KM A TTORNE Y5 I. HARTER FURNACE May 14, 1929.

Filed Dec. 16, 1925 2 Sheets-Sheet 2 Z I llfl runiraere.

. application filed hcceinber tion and the annexed drawings, in which Fig. 1 is a sectional elevation of an illustrative form of furnace which I have chosen for purpose of illustration of my invention;

1e lEig. 2 is an enlargement of a portion of one of the. walls shown in Fig. 1; .Fig. 3 is a View from the left of Fig. 2, with some of' the parts broken away; F1g. 4 is a plan view of a cast-iron backing to be described more 15 in detail hereinafter, and "Fig. 5 is a section on the line 55 of Fig. 4.

Like reference characters indicate like parts inthe several views. .4

In the illustrative embodiment, the furnace chamber is provided with vertically extending walls, all of which maybe substantially alike, so that the description of one of them will be sufficient. The wall itself is made up of an inner and an outer portion, the inner portion being made up primarily of refractory tile and 11 air ranged in courses, the outer portion 12 being made u of fixed beams 13 to which are fastene vertical members 14, these members being spaced across the wall and the spaces therebetween being filled up in the usual manner with panels 15, these panels preferably being lined with an insulating,

material.

form the support for the lnner portion of the wall is a plurality of vertically disposed members 1b,,spaced across the wall and connected to the members 14 by tie members 17' to to provide an air space between the inner and the outer portions of the wall.

Each of the tile 10 and 11 has connected thereto so as to be closely .in contact therewith, a metallic backingwhich, as best shown in Figs. 4 and 5, is made up of a backing plate 18 having upstanding edges 19 undercut. at 20 with solid portions 21 having holes 21 for the bolts which hold the backing in position, as will be described more fully hereinafter.

Un the side of the plate 18 opposite the upstanding edges 19 is a pluralityof heatconducting fins or projections 22 preferably tilt . formed integral with the Extending-parallel to the members 14 to it, met. tertal lto. raera' plate. 18 extending outwardly therefrom.

A. tile 10 or 11 may be attached to the backing plate in any suitable manner, as, for

instance, by. forming the tile'and then cast ing the backingaround the refractory; Any other suitable method may be used so long'as the contact between the refractory and, the. metal is a close one topermit the heat from the furnace chamber which is taken up bythe tile 10. and 11 to be transmitted to the metal backing.

The tile, with their, hackin' are assembled to form the wall, with the e ges 19 of adj-accnt tile in contact, the plates 18 being held against the members 16' bybolts passing through holes in the flanges of members 16 and'into the ho1es121 The fins 22. extend. into the space between the inner and outer" portions of the wall and there-fore readily radiate into the air in this space the heat which is transmitted through the interior portion of the wall. r

Preferably air will be circulated through the space between the inner and outer portions and alongthe fins or projections 22 and one form of'such arrangement is shown in Fig. 1, in which a fan 24 forces air through the duct 25 into the space between the inner andouter portions of the rear wall of the furnace, from whence the air flows along the fins around either side of the furnace, and then along the front, and finally through the openings'26'into the furnace chamber. In the illustrative form, a powdered fuel burner 27 is supplied by air drawn from the space between the inner and outerportions of the front wall by a fan 28 through a duct 29, the air from the fan being led through the duct 30 to a distributing duct 31, and

- from thenceto the burner or burners, as the which I have described, the tile forming the interior face of the wall may be made relatively thin without danger of the wall being destroyed, because the heat transmitted to such tile from the furnace chamber is carried away by the intimate contact between the .tile and the backing plate and the air in contact with the large radiating fins.

It will be understood that in my arrangement, the brick would preferably be made of a material having a high heat conductivity, so as to more readily transfer the heat from the front face of the wall to the metallic" disposed wall comprising an inner and an outer portion spaced apart to form an air space therebetween, said inner portion having a plurality of refractory tile, each with a separate metallic backing closely 1n contact therewith and attached thereto and with the backing away from the interior of the furnace, said -metallic backing having projections extending into said air space.

2IA furnace chamber having a vertically disposed wall comprising an inner and an outer portion'spaeed apart toform an air space therebetween, said inner portion having a plurality of refractory tile, each wlth a separate metallic backing closely in contact therewith and attached thereto and with the backing away from the interior of the furnace, said metallic backing having projections extending into said air space, and means to circulate air through said space and into the furnace chamber.

3. A furnace chamber having a vertically disposed wall comprising an inner and an outer portion spaced apart to form an air space therebetween, said inner portion having a plurality of refractory tile, each with a separate metallic backing closely in con-' tact therewith and attached thereto and with the backing away from the interior of the furnace, said metallic backing having projections integral therewith .4. A furnace chamberhaving a vertically disposed wall comprising an inner and an outer portion spaced apart to form an air space therebetween, said inner portion having a plurality of refractory tile, each of said tile having a separate metallic backing closely in contact therewith and attached thereto, said backing extending around the sides of the tile, said tile being held with the backing away from the interior of the furnace chamber with the several backings edge to edge, each backing having projections integral therewith and extending into said'space.

5. A.furnace chamber having a vertically disposed Wall comprising an inner and an outer portion spaced apart to form an air 'space therebetween, said inner portion having a-plurality of refractory tile, each of said tiliehaving a separate metallic backing and extend;

closely in contact therewith and attached thereto, said backing extending around the sides of the tile, the backing away from the interior of the furnace chamber with the several backings edge to edge, each backing having projections integral therewith and extending into said space, and means to circulate air through-said space. i

6. A tile for use in a furnace chamber, said tile comprising a brick of refractory material and a metallic plate having one face in contact with one face of the brick and having an upstanding projection sur-- rounding the brick and engaging adjacent edges thereof to hold the plate and brick in contact, the other face of said plate having a cooling fin extending outwardly therefrom.

7. A tile for use in a furnace chamber, said tile comprising a relatively thin metal backing plate, having a recess in one face thereof with its edges undercut, said recess extending over the major portion of the area of the plate, a plurality of lugs extending into said recess from said edges to provide means adapted to engage fastening members, and a refractory tile having a portion thereof in said recess and engaging adjacent undercut edges of the plate to hold the plate and brick in close contact.

8. A furnace chamber having a vertically disposed wall comprising a plurality of refractory tile, each tile having a separate metallic backing closely in contact with the tile and attached thereto and with the back ing away from the interior of the furnace, said metallic backing having a projection extending outwardly therefrom.

9. A furnace chamber having a vertically disposed wall comprising a plurality of recurin the inner and outer )ortions to ether.

11. A furnace wall comprising an inner and an outer portion, a metallic backing 011 said inner portion having cooling fins extending into the space between the portions, a plurality of spaced tie members securing the inner and outer portions together, and a refractory tile supported on said backing and forming the inner surface of said inner portion.

ISAAC HARTER.

said tile being held with 

